[igraph] Adding structure to empty graph

[Andrew Conway]

I would like to write a function that takes some edges data and adds it to a given graph, which starts as an graph.empty().  The edge data would be added iteratively, and at each iteration the edges are represented as a vector of characters, e.g. c('actor1','actor2').  These actors may or may not exist in the graph already.

I am having a hard time figuring out how to accomplish this in igraph.  It seems that igraph wants to generate some fixed number of vertices for a graph, then add structure.  Also, is it possible to add character vertices to graph objects, or does everything have to go through the V(g)$name attributions?

Any advice is greatly appreciated.

___________________________________

Drew Conway

Ph.D. Student

Department of Politics, New York University

address@hidden

http://www.drewconway.com/zia

@drewconway